Piston-ring tool



Jan. 24, 1928.

IMP.

1,657,294 J. J; ALLISON, JR.. ET AL PISTON RING TOOL Filed Jan. 13. 1926 I N V E N TOR S @fi/LJAZZLso/um, B Y Jetfs e J l f it Patented Jan. 24, 1928.

U NIT E D STATES PATENT OFFICE.

JOHN J. ALLISON, JPm, AND JESSE SACKS, F CHANDLER, ARIZONA.

PISTON-RING TOOL.

Application filed January lhis invention relates to piston ring compressing tools and has for its primary object the provision, in a manner as hereinafter set forth, of a tool adapted to be extended upwardly through the open underside of an automobile engine crank ease, to compress the ring about a piston so that the piston may be replaced in its cylinder through the crank case.

It is well known that connecting rods, connecting rod bearings and wrist pins may be replaced from the underside of an engine crank case, without removing the engine head. This work is often done in hurry-up jobs and when thework is done in this manner, the piston is drawn downwardly far enough out of the lower end of this cylinder to enable the operator to reach the wrist pin but without allowing the upper rings to leave the cylinder. The lower ring of the piston, however, slips out of the cylinder and unless the operator has the proper tool to compress this ring when replacing the piston, the ring is broken oil and removed and the piston replaced in the cylinder minus the lower ring. \Vhen this is done loss of compression and oil pumping results.

The tool embodying this invention contemplates the provision of a pair of substantially semi-circular jaw members each carrying at one end an arm or handle, these handles being crossed and pivotally secured together to hold the jaw members in opposed relation. The handles where they are attached to the jaw members extend outwardly therefrom at an oblique angle with respect to the side of the jaws so that the jaws may be brought together about a piston ring to compress the same without having the handles of the compressor in the way of the connecting rod and crank shaft. In this man nor the lower ring may be compressed and the piston replaced in the cylinder with all of its rings intact, instead of removing the lower ring and replacing the piston minus one ring as is the usual custom.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding that the invention is not confined to any strict conformity with the showing of the drawing but may be changed and modified so long as such changes and modifications mark no material departure from the salient features 13, 12326. Serial No. 81,050.

of the invention as expressed in the appended claims. 7

In the drawing Figure 1 shows the tool embodying this invention in side elevation. and as gripping the lower ring of a piston. Y

Figure 2 shows the tool in elevation, and

Figure 3 shows a top plan view of the tool in position about a piston and ring.

Referring now to the drawing in detail wherein like numerals of reference indicate corresponding parts throughout the several views, there is indicated by the numeral 1 a portion of an engine cylinder shown in vertical section, with a piston 2 positioned in the lower portion thereof and having connected thereto the usual connecting rod 8. T he usual piston rings are indicated by the numeral l.

The implement embodying this invention comprises a pair of substantially semi-circular jaw men'ibers 5, one end of each of the jaw members being curved back upon itself to provide a loop or eye as indicated. at 6.

Associated with each of the jaw men'ihers 5 is a handle member, each being indicated by the numeral 7. Each of these handle members 7 comprises an inner elongated holding portion 8, an outer ofiset portion 9 and an intermediate angularly disposed portion 10 which provides for the offsetting of the portion 9 relative to the portion 8. The portions 10 are flat, extend across, and are pivotally connected together by means of the pivot member 11.

The free end of each. outer portion 9 is bent at an obtuse angle with respect to the remaining part of said portion, and the said obtuse angular portion is indicated at 12 and fitted into the eye or loop 6 of the jaw inenr her 5, as shown in Figure 3. I A securing material such as solder is then employed to secure the ends 12 in the loops or eyes (i of the jaws as indicated at 13, or these jaw ends may be welded in the ends 12 of the handle member as desired. .lt will be seen that after affixing the crossed handles 7 to the ends of the jaw members 5 in the man er shown and explained, that the concave faces of the jaws 5 will be held in opposed relation and thus the handle member will be extended at an acute angle with respect to the side faces of the jaws 5.

This particular angle at which the handles are secured to the jaw members 5 enables the jaws to be extended upwardly through.

the open hotton'fotthe canli case. to grip r w 0i l is a w" i and compress a piston ring into its groove in the piston 2, to enable the mechanic to re-insert the piston in. its cylinder, without 5 having the handles of the ringgripper in the Way of the connecting rod andcraiik shaft of the engine. a

From the foregoing description it will be readily seen that there hasheen provided a in new and unique piston ring con ipressing tool, by means of which a ring nialy be easily compressed for the quick and easy replace iiient of apiston in this cylinder. H

Having thus described our invention,

15 "what, we claim is:-

1. A piston ring "coin n'essing tool of the t-liatlicter deshifibed, comprising apair of opposed substantially seini-oitcu]an re ilient 'jaws, each at oiio end bent upon" itself to sub it a 1001), each eye lieiiigdaterally offset from the jaw at its outerfat'e, a pair of crossed pivotallj eonnected handles, and there being obtuse angled portions bent from said haitdles at one end of the same and disposed at correspondingangles to each circular resilient jaws, each at one end being outturned upon itself, a pair of ero sad pivotally connectedhandles, eairh of said handles having its o'titen potash oil'set with it it t i H i. t, m. respect to the ren'iaunn; part thereof, and.

said offsetportionshavingi the (fitter parts thereof d sposed at an obtiiso angle with respect to' the nine; parts thereof and with said "otiter 'jarts prmnged at corresponding angles and secured to the outttirnedends of said jaws, said jaws being free of ;h other at their other lindsi'nmte from the bub corned ends.

testiii'iony whereof, we afiii; our natures hereto.

JOHN J. A lases, J. JESSE *Jiicits. 

